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EP 3 386 660 A1

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(43) Date of publication: 17.10.2018 Bulletin 2018/42 (21) Application number: 16809157.7 (22) Date of filing: 29.11.2016

(51) International Patent Classification (IPC):  B22F 1/00(2006.01) B22F 9/24(2006.01) B01D 61/14(2006.01) (86) International application number: PCT/GB2016/053738 (87) International publication number: WO 2017/098207 (15.06.2017 Gazette 2017/24)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 08.12.2015 GB 201521581 (71) Applicants: Quantum Chemical Technologies (Singapore) Pte Ltd Singapore 609288 (SG) Singapore Asahi Chemical & Solder Industries Pte Ltd Singapore 609288 (SG) Agency for Science, Technology and Research Singapore 138632 (SG)

(72) Inventors: CHEW, Kai Hwa Singapore 609288 (SG) LIM, Meng Kiong Singapore 609288 (SG) WU, Yong Ling Singapore 138632 (SG) HUANG, Hui Singapore 138632 (SG) (74) Representative: Bond, Christopher William  Forresters IP LLP Skygarden Erika-Mann-Strasse 11 80636 München 80636 München (DE)